Crude petroleum is converted to useful products by the process of?
fractional crystallization
fractional distillation
filtration
chromatography
Correct answer is B
A process called fractional distillation is used in oil refineries to separate (as well as join or split) the various lengths of hydrocarbon chains to create different petroleum products from the different distillates.
An organic compound which decolorizes bromine water is likely to be?
C\(_3\)H\(_8\)
C\(_2\)H\(_6\)
C\(_4\)H\(_10\)
C\(_2\)H\(_4\)
Correct answer is D
If you shake an alkene with bromine water (or bubble a gaseous alkene through bromine water), the solution becomes colourless.
Alkenes decolourise bromine water.
In order to electroplate spoon with silver, the arrangement of the electrolytic cell is?
the anode is a silver rod and the cathode is the spoon
the anode is the spoon and the cathode is a silver rod
the electrolyte is silver trioxonitrate(v)( solution and the cathode is a silver rod.
the electrolyte is silver trioxonitrate(v) solution and the anode is the spoon
Correct answer is A
The steel spoon to be coated with silver is the cathode of the electrolytic cell and the anode of the electrolytic cell is made of a silver metal
hydrogen sulphide
carbon(ii)oxide
chlorine
sulphur(iv)oxide
Correct answer is C
Chlorine is a yellow-green gas at room temperature. Chlorine has a pungent, irritating odor similar to bleach that is detectable at low concentrations.
Exposure to low concentrations of chlorine (1 to 10 ppm) may cause eye and nasal irritation, sore throat, and coughing. Inhalation of higher concentrations of chlorine gas (>15 ppm) can rapidly lead to respiratory distress with airway constriction and accumulation of fluid in the lungs (pulmonary edema).
An organic functional group which can likely decolorize ammoniacal silver nitrate is?
alkene
alkane
alkyne
alkanol
Correct answer is C
Terminal alkynes react with Tollens reagent (ammoniacal silver nitrate solution) to form silver alkynides as a white precipitate, whereas internal alkynes do not react with Tollens reagent.